From owner-freebsd-questions@FreeBSD.ORG Tue Dec 3 03:23:41 2013 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 236DF906 for ; Tue, 3 Dec 2013 03:23:41 +0000 (UTC) Received: from nk11p04mm-asmtp001.mac.com (nk11p04mm-asmtpout001.mac.com [17.158.236.236]) by mx1.freebsd.org (Postfix) with ESMTP id 05B0710BD for ; Tue, 3 Dec 2013 03:23:40 +0000 (UTC) Received: from [192.168.0.163] ([24.237.133.115]) by nk11p04mm-asmtp001.mac.com (Oracle Communications Messaging Server 7u4-27.08(7.0.4.27.7) 64bit (built Aug 22 2013)) with ESMTPSA id <0MX7007WKLAXDJ40@nk11p04mm-asmtp001.mac.com> for freebsd-questions@freebsd.org; Tue, 03 Dec 2013 02:23:22 +0000 (GMT) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.11.72,1.0.14,0.0.0000 definitions=2013-12-02_04:2013-12-02,2013-12-02,1970-01-01 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 suspectscore=1 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=7.0.1-1308280000 definitions=main-1312020224 Content-type: text/plain; charset=us-ascii MIME-version: 1.0 (Mac OS X Mail 7.0 \(1822\)) Subject: Re: gmirror, gpart and MBR vs GPT in the Handbook From: Peter Giessel In-reply-to: <20131202184642.d35c4548.freebsd@edvax.de> Date: Mon, 02 Dec 2013 17:23:20 -0900 Content-transfer-encoding: quoted-printable Message-id: References: <201311301303210813.05DE187E@smtp.24cl.home> <201312011121580096.005D00FB@smtp.24cl.home> <201312021213320528.00673D5F@smtp.24cl.home> <20131202182623.43331984.freebsd@edvax.de> <201312021235030914.007AF1DF@smtp.24cl.home> <20131202184642.d35c4548.freebsd@edvax.de> To: freebsd-questions@freebsd.org X-Mailer: Apple Mail (2.1822) X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 03 Dec 2013 03:23:41 -0000 On 2013, Dec 2, at 8:46, Polytropon wrote: > I think you're correct regarding this finding: The data type 2^32 > (because of 32 bit) defines the 2 TB limit. It applies both on > MBR (which stores 32 bit values) and UFS (which also stores 32 > bit values). However, I've never dealt with disks > 2 TB _and_ > UFS before, so I can't add specific individual findings. :-) UFS works on drives bigger than 3 TB (ref /dev/da1p1 and = /dev/mirror/gm0.journal): [17:20][media: ~]> df -h Filesystem Size Used Avail Capacity Mounted on /dev/da0s1a 247M 216M 11M 95% / devfs 1.0k 1.0k 0B 100% /dev /dev/da1p1 4T 3.6T 82G 98% /media /dev/da0s1e 3.9G 5.1M 3.6G 0% /tmp /dev/da0s1f 7.5G 5.8G 1.1G 84% /usr /dev/da0s1d 3.9G 733M 2.9G 20% /var /dev/mirror/gm0.journal 2.7T 1.8T 645G 74% /media/mythtv [17:20][media: ~]> more /etc/fstab # Device Mountpoint FStype Options Dump = Pass# /dev/da0s1b none swap sw 0 = 0 /dev/da0s1a / ufs rw 1 = 1 /dev/da1p1 /media ufs rw 2 = 2 /dev/da0s1e /tmp ufs rw 2 = 2 /dev/da0s1f /usr ufs rw 2 = 2 /dev/da0s1d /var ufs rw 2 = 2 /dev/mirror/gm0.journal /media/mythtv ufs rw,async 2 = 2 /dev/acd0 /cdrom cd9660 ro,noauto 0 = 0